util.rs

 1// SPDX-License-Identifier: GPL-2.0
 2
 3/// Converts a null-terminated byte slice to a string, or `None` if the array does not
 4/// contains any null byte or contains invalid characters.
 5///
 6/// Contrary to [`kernel::str::CStr::from_bytes_with_nul`], the null byte can be anywhere in the
 7/// slice, and not only in the last position.
 8pub(crate) fn str_from_null_terminated(bytes: &[u8]) -> Option<&str> {
 9    use kernel::str::CStr;
10
11    bytes
12        .iter()
13        .position(|&b| b == 0)
14        .and_then(|null_pos| CStr::from_bytes_with_nul(&bytes[..=null_pos]).ok())
15        .and_then(|cstr| cstr.to_str().ok())
16}